青海东部地区盐渍土的分布特征及工程应对措施

Distribution Property of Saline Soils and Methods of Engineering Consolidation in Qinghai East-area

青海东部地区盐渍土主要分布于山麓斜坡带高阶地和河谷高漫滩，前者属中一弱硫酸、亚硫酸盐渍上，且多具中等-强烈湿陷性，盐份主要来自斜坡后缘含盐碎屑岩风化物及易溶盐；后者为亚氯、亚硫酸盐渍土，溶于土中的盐份系浅层咸地下水常年毛细上升蒸发所致．盐渍土具有溶陷性、盐胀性、腐蚀性，工程建设中要引起重视．

The saline soils are mainly distributed in the piedmont slope zone, high terrace and high valley flat in Xining area. The former is middle to weak sulfuric and sulfurous saline soil with middle to strong collapsibility, its salt content mainly came from the salt-bearing clasolite in bake margin of slope and from the soluble salt;the latter is dle-chlorous and sulfurous sahne soil, its salt content came from the shallow saline ground-water through capillary action and evaporation year in year out. It is necessary to pay attention to the saline soils in the engineering construction because of its loosening ex-pansion, collapsibility and corrosiveness.